Tractor truck mechanism.



`\/\/.TUR'I\1BUL5L.V TRAcro TRUCK''MECHANISML APPLICATION FILED )UNE 2,1917.

Patented @et 2v2, 19185.

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vv. TURNB'ULL. TRACTOR TRUCK NIECHANISM..

APPLICAHON FILED )UNE 2. i917.

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"iBACIOR TBUQK MECHANISM.

APPLICATION FLED JUNE 2, 1917. v 1,2232?, Patented om.. 22, 1918.

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WILLIAM TUBNBUIJL, OF TEORIA, ILLINOIS, A'SSIGNOR TO THE HOLT MANUFACTURING Y COMPANY, OF STQCKTON, CALIFORNIA,

A CORPORATION OF CALIFORNIA.

TRACTOR TRUCK MECHANISM.

Specification` of Letters Patent.

Patenten oet. 22, reis.

Application filed .Tune 2, 1917. Serial No. 172,400.

To all whom it' may concern:

Be it known that I, WILLIAM TU RnBULL, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented new and useful Improvements in Tractor Truck Mechanism, of which the following is a specification.

This invention relates to tractors or other vehicles of the self-'laying track type, as eX- emplilied in my prior application `Serial Number 77,382, filed February 10, 1916, and in the application of Emil F. Noreliusand myself, Serial vNumber 135,462, filed December 6, 1916, wherein a double set of chain tracks is employed on each side of the vehicle, supported and driven by a double set of sprocket wheels, and the roller truck mechanism is made up of a series of pairs of rollers spacedco-axially apart,whereby an increased bearing and tread surface is provided for supporting heavy loads in'soft and marshy lands.

One form which my invention may assume is exemplified in the following description and illustratedin the accompanying drawings, in which- Figure 1 shows a side elevation of the roller truck mechanism, the rollers at the front being removed and the driving and' supporting wheels for the endless track being shown in dotted lines. v

Fig. 2 shows a plan view of the roller truck mechanism, with the longitudinal girder bars at the top thereof removed.

Fig. 3 shows a cross section of the selfoiling bearing employed therein, being taken on the line 3 3 of Fig. 2.

Fig. 4 shows an end elevation of the roller truck mechanism viewed from the rear.

Fig. 5 shows a plan View of the longitudinal girder bars at the top of the roller truck mechanism with their connected idler rollers for supportingthe upper run of the chain track.

Fig. 6 shows a detail view of the cushioning andv supporting springs between the roller truck mechanism and the main frame.

Fig. 7 shows a side elevation of a selflaying track mechanism embodying the invention.

In general, the truck, mechanism comprises a pair of laterally spaced driving sprocket wheels 10, -journaled upon the main frame of the tractor at the rear thereof and at each side, and an articulated roller truck frame 11 carrying a series of spaced pairs of rollers 12. Upon the roller truck frame are springs 13 which receive and support the mainframe of the tractor throughthe rigid transverse beams 14. A pair of laterally spaced and axially alined idler wheels l5 is journaled on the forward end of one of the roller truck frame members and the endless, flexible track 15 passes around the driving and idler wheels and forms a track for the rollers 12, said double set of chains, as more fully shown and described in the prior applications referred to.

A bent link .16 is pivoted at its 4rear end to one of the transverse bars 14 and at the forward end to the joint 17 between the truck frame members l1 and serves as a thrust rod Ato propel the trucks and maintain the idler and driving wheels spaced apart. Each of the roller truck frame members 11 comprises a one-piece inverted channel bar track comprising a through, Fig. 1 showing the outer ends of these axles with the rollers removed therefrom. The rollers are flanged and at each side the adjacent rollers have their flanges reversed.

A housing 21 for each axle is -formed on the frame bar by casting va U-shaped web on the under portion of the top plate extending transversely between the side flanges and made integral therewith. Bushings' 22 are litted into the bearings at the frame bars and between them carried upon the axle is a perforated collar` 23. The portion of the housing surrounding; the co1- lar is reamed out to provide a chamber 24, into which a loose fabric or other' permeable packing 25 may be inserted. The housing is filled with oil through the screw cap 26 in the top plate and the bearing surfaces lubricated by the passage of the oil through the packing, perforated collar and thence to the axle and passing longitudinallyl along naled'on the' girder bars, and guides for. the upper run of the chain the latter to the interior of the bushings. The oil is drained out through lower screw caps'27. The springs plates of the roller truck frames, two of said vsprings being placed upon the rear f rame track. i

Having .thusdescribed `my' invention, what I claim and desire-to secure by Letters Patent ischannel ,baarsV hinged together,

1. In a tractor of the self-laying track type employing a double set-of chain tracks on each side and a double set of driving and carrying wheels therefor, a roller truck mechanism embodying one-piece inverted andaxles journaled lin the downwardly extending flanges of the bars and provided at each end with aroller to operate upon the adjacent chain track.

2. In a tractor o f the self-laying tracktype employing a double set of chain tracks on ,each side anda double set of driving and carrying wheels therefor, a roller truck mechanism embodying; one-piece inverted channel bars hinged together, axles journaled in' the downwardly extending flanges of the bars and' provided at each end with a roller to operate upon the adjacent chain y track, and a housing vfor each axle formed on` the bottom of the frame bar and extending between the flanges thereof, said housing being arranged to containy oil whereby to lubricate the bearings of the axle.

3. In a `tractor of the self-laying .track type employinga double set=of chain tracks between. the flanges vided at each end with a roller to operate on eachl side 4and L carrying-wheels therefor,

a double set of driving and a roller' truck mechanism embodying one-piece inverted channel bars hinged together, axles journaled in Vthe downwardly extending flanges of the bars and provided at each end with a roller to operate upon the adjacent chain track, a housing for each axle formed on. the bottom of the frame bar and'4 extending vof--the vbars and proupon the adjacent chain track` a housing for each axle formed on the bttm of the frame bar and extending, between the flanges thereof. said housing being arranged to contain oil whereby to lubricate the bearings of the"axle, bushings atthe sides ofthe frame bar projecting into the housing, and

13 are-seated upon the top 'i' Lon'gitudivings. said lhousin portion surrounding type employing type employing a l ing, ylaterally spaced 4. Ina tractor" of the self-laying track of chain tracks on each side and a double set of driving and carrying wheels therefor, a roller truck mechanism embodying one-piece inverted channel bars hinged together, axles journaled in the downwardly extending flanges of lthe bars and providedat each end-with a roller to operate .uponthe adjacent chain track, a housing for each axle formed on the bottom of the frame bar 'and extending between the flanges of the bars and provided at each end with a roller to operate upon the'adjacent chain track, a housing for each axle formed on the bottom of the frame bar and extending between the flanges thereof, 'said' housing being arrangedgto contain oil whereby to lubricate the bearings of the axle, bushings at the sides ofthe frame` bar type employing a double set projecting into the housing, and a perfo-4 the bushout at the the collar and packed at such portion with a permeablesubstance. 5. In a tractor of the self-laying track a double'set of chain tracks on each side .and a double set. of carrying wheels therefor, a'roller truck mechanism embodying longitudinally extending onepiece frame bars hinged together, springs on the frame bars supporting the main rame of the tractor, and a link connection between the main frame andthe joint of the frame bars serving to propel the roller truck mechanism.l

6. In a tractor of the'self-laying track type employing on each side and a double set` of carrying wheels therefor, a roller truck mechanism rated collar -on the axle between g being reamed `.embodying articulated frame members, a

pair of fore and aft spaced springs on the rear member, and a pair of transversely spaced springs on the front member, serving to support and carry themain frame.

v 7. In a tractor on each side and a double set vof carrying wheels therefor, a Iroller truck mechanism embodying larticulated frame members, cushioning and supporting springs on the roller truck frames,

girder bars rigidly secured to theA main frame at the sides thereof,

and saddles extending betweenthe girder bars and seated upon said springs.

8. In'a tractor of the self-laying track type employing a wheels therefor. a

articulated, frame members,

icushioning and supporting springs on theI roller truck frames. longitudinally extending, laterally spacedI girder bars rigidly seadouble set of chain tracks longitudinally extend` double set ofchain tracks y-on each. side and a double set of carrying lio of the self-laying trackv double set of chain tracks cured 4to the main frame at the sides thereof, In testimony Wheeof I have hereunto set saddles extending between the grder bars my hand in the presence of tWo subscribing and seated upon said Springe and axles Witnesses.

journaled on the grder bers extending ILLAM TURNBULL. transversely thereof and carrying at each W'itnesses:

end a roller to supplt and guide the uppe E. F. MOREMUS,

run of the adjacent track. H. L. BOSWELL. 

